aq·ue·duct /ˈækwəˌdəkt/ 名詞
1. A conductor, conduit, or artificial channel for conveying water, especially one for supplying large cities with water.
Note: ☞ The term is also applied to a structure (similar to the ancient aqueducts), for conveying a canal over a river or hollow; more properly called an aqueduct bridge.
2. Anat. A canal or passage; as, the aqueduct of Sylvius, a channel connecting the third and fourth ventricles of the brain.
n : a conduit that resembles a bridge but carries water over a